Disposable vein blood taking needle

Abstract

The invention relates to the field of medical instruments, in particular to a disposable vein blood taking needle which comprises a blood taking needle head, a blood taking needle head protection sleeve, a connector, a blood taking tube puncture needle head and a rubber protection sleeve, the blood taking tube puncture needle head is sleeved with the rubber protection sleeve, and the front end of the rubber protection sleeve is closed to wrap the front end of the blood taking tube puncture needle head. A bag-shaped object is integrally formed on the rubber protective sleeve and is communicated with the rubber protective sleeve. The blood sampling needle head can effectively prevent the blood leakage phenomenon at the blood sampling needle head end.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a disposable venous blood collection needle. Background Art

[0002] The venous blood collection needle is used to extract blood samples from the patient's vein. Its conventional structure includes a blood collection needle, a connector, a blood collection tube puncture needle, a blood collection tube, etc., wherein one end of the connector is connected to the blood collection needle and the other end is connected to the blood collection tube puncture needle. The blood collection needle is covered with a hard plastic protective cover, while the blood collection tube puncture needle is covered with a rubber protective cover. During venous blood collection, the blood collection tube puncture needle of the blood collection needle is inserted into the vacuum blood collection tube (the rubber protective cover is squeezed during the puncture process and remains outside the vacuum blood collection tube), and the end of the blood collection needle is inserted into the vein at an appropriate angle. After the blood collection is completed, the blood collection tube puncture needle is pulled out, and the rubber protective cover is restored to its original state to cover the blood collection tube puncture needle to prevent stabbing, and the blood collection needle is immediately pulled out of the vein. In actual use, when the blood collection needle is pulled out, blood will drip from this end, which is prone to environmental pollution and cross-infection problems. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a disposable venous blood collection needle, which has a very reasonable structural design and is easy to use, and will not cause cross infection or stab the operator.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A disposable intravenous blood collection needle includes a blood collection needle, a blood collection needle protective cover, a connector, a blood collection tube puncture needle, and a rubber protective cover, wherein the rubber protective cover is sleeved outside the blood collection tube puncture needle and the front end of the rubber protective cover is closed to wrap the front end of the blood collection tube puncture needle. It is characterized in that a bladder is integrally formed on the rubber protective cover, and the bladder is connected to the rubber protective cover. In the process of piercing the blood collection tube puncture needle together with the rubber protective cover into the vacuum blood collection tube bottle stopper, the bladder of the rubber protective cover is squeezed. When the blood collection is completed, the blood collection tube puncture needle is pulled out, and the bladder is restored to form a certain suction force. After the blood collection needle is pulled out of the vein, there will be no blood dripping from the end of the blood collection needle.

[0005] Preferably, the bladder is a spherical bladder or a gourd-shaped bladder surrounding the rubber protective sleeve. The bladder surrounds the rubber protective sleeve to make the suction more uniform and the suction effect better.

[0006] Preferably, the capsule is arranged away from the front end of the blood collection tube puncture head.

[0007] Preferably, a first slide groove is formed on the inner wall of one side of the above-mentioned blood collection needle protective cover, and the first slide groove does not penetrate the wall of the blood collection needle protective cover, and a second slide groove is formed on the other side of the blood collection needle protective cover, and the second slide groove penetrates the wall of the blood collection needle protective cover, and the first slide groove and the second slide groove are symmetrically arranged; the blood collection needle includes a hollow steel needle, a connecting seat, and a connecting tube; wherein the connecting tube is connected to the connector, and the two ends of the connecting seat are respectively connected to the hollow steel needle and the connecting tube, and the connecting tube is connected to the hollow steel needle, and the connecting tube is a hose or a corrugated tube; a slider embedded in the first slide groove and a needle handle connecting seat extending from the second slide groove are formed on the connecting seat, and the slider is slidably matched with the first slide groove; the needle handle is connected to the needle handle connecting seat.

[0008] Preferably, a limiting boss is formed on the outer wall of the blood collection needle protective cover near the end of the blood collection needle, and the needle handle is rotatably connected to the needle handle connecting seat. When the needle handle drives the steel needle to move to the maximum position extending from the protective cover, the needle handle is rotated 90 degrees to make the needle handle lean against the limiting boss to prevent the blood collection needle from retreating during venipuncture.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention forms a bladder on the rubber protective sleeve, which can form a negative pressure attraction by squeezing and releasing the bladder, thereby preventing blood from dripping from the blood collection needle tip, thereby preventing cross infection, etc., and because the squeezing and releasing of the bladder are achieved by piercing the blood collection tube, no additional action is required to operate the bladder, so the overall blood collection operation is simple; 2. The new design of the blood collection needle protective cover of the present invention can still protect the blood collection needle after blood collection without the operator having to touch the blood collection needle, thereby achieving the purpose of avoiding the blood collection needle from stabbing people and blood contamination of the blood collection needle after blood collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the state of the bladder-like object of the present invention on the rubber protective sleeve; Figure 3 This is a schematic diagram of the structural position connection relationship of the blood collection needle protective cover, the blood collection needle, etc. of the present invention; Figure 4 This is a schematic diagram of the position of the second slide groove on the blood collection needle protective cover of the present invention. DETAILED DESCRIPTION

[0011] The present invention is now further described in conjunction with the accompanying drawings. The parts not described in detail below are all carried out according to the existing technology and common knowledge in the field.

[0012] like Figure 1-4As shown, the disposable intravenous blood collection needle of the present invention comprises a blood collection needle 1, a blood collection needle protective cover 2, a connector 3, a blood collection tube puncture needle 4, and a rubber protective cover 5. As in the prior art, the blood collection needle 1 is used for intravenous puncture and is connected to one end of the connector 3, and the other end of the connector 3 is connected to the blood collection tube puncture needle 4. The rubber protective cover 5 is sleeved on the outside of the blood collection tube puncture needle 4 and the two can be connected by a conventional detachable connection method or a conventional fixed connection method. In order to solve the problem of blood dripping from the end of the blood collection needle 1 after it is drawn out, the present invention makes the following technical innovations: First, a bladder 6 is integrally formed on the rubber protective cover 5 (protruding from the outer surface of the rubber protective cover 5). The bladder 6 can be a spherical bladder, a rectangular bladder, etc. formed on one side of the rubber protective cover 5, or it can be an annular spherical bladder or a gourd bladder formed on the outer ring of the rubber protective cover. In practice, an annular gourd bladder is preferred. Because the bladder 6 is connected to the rubber protective sleeve 5, and the head end of the rubber protective sleeve 5 is closed when not in use, and there is a gap between the outer periphery of the blood collection tube puncture needle 4 and the inner wall of the rubber protective sleeve 5, the bladder 6 is squeezed during the process of the blood collection tube puncture needle 4 piercing the vacuum blood collection tube. When the blood collection tube puncture needle 4 is pulled out, the bladder 6 is restored, and the blood collection tube puncture needle 4 is protected by the rubber protective sleeve 5 (although during the puncture process, the blood collection tube puncture needle 4 will pierce the closed front end of the rubber protective sleeve 5, after being pulled out, the rubber protective sleeve 5 returns to its position to continue to protect the blood collection tube puncture needle 4 and prevent blood from dripping from the end of the blood collection needle 4). The negative pressure attraction generated by the restoration of the bladder 6 acts on the end of the blood collection needle 1, thereby preventing blood from dripping from the end of the blood collection needle 1; the bladder 6 of the present invention is preferably arranged away from the front end of the blood collection tube puncture head to reduce the puncture resistance.

[0013] Second, by redesigning both the blood collection needle and the blood collection needle protective cover, the end of the blood collection needle is still protected after the blood collection is completed. The specific design is that a first slide groove 2.1 is formed on the inner wall of one side of the blood collection needle protective cover 2, and the first slide groove 2.1 does not penetrate the wall of the blood collection needle protective cover 2. A second slide groove 2.2 is formed on the other side of the blood collection needle protective cover 2, and the second slide groove 2.2 penetrates the wall of the blood collection needle protective cover 2. The first slide groove 2.1 and the second slide groove 2.2 are symmetrically arranged. The blood collection needle 1 includes a hollow steel needle 1.1, a connecting seat 1.2, and a connecting tube 1.3; wherein the connecting tube 1.3 adopts a medical hose or a corrugated tube. When a medical hose is adopted, it is necessary to leave a margin for the hollow steel needle 1.1 to fully extend out of the blood collection needle protective cover 2. When a corrugated tube is adopted, it is also necessary to ensure that the hollow steel needle 1.1 can be fully extended from the blood collection needle protective cover 2. One end of the connecting tube 1.3 is fixedly connected to one end of the connector 3, and the other end of the connecting tube 1.3 is fixedly connected to the connecting seat 1.2. The other end of the connecting seat 1.2 is fixedly connected to the hollow steel needle 1.1. The hollow steel needle 1.1, the connecting tube 1.3 and the connector 3 are connected. A slider 1.21 embedded in the first slide groove 2.1 and a needle handle connecting seat 1.22 passing through the second slide groove 2.2 are formed on the connecting seat 1.2. The slider 1.21 is slidably matched with the first slide groove 2.1; the needle handle 1.4 is connected to the needle handle connecting seat 1.22. The hollow steel needle is driven by the needle handle to move or extend or retract in the blood collection needle protective cover, which can complete normal blood collection, and can also protect the blood collection needle from stabbing the operator after the blood collection is completed, while also avoiding direct contact with the blood collection needle.

[0014] Regarding the optimization scheme of the second point, a limited position boss 1.5 can be formed on the outer wall of the blood collection needle protective cover 2 and near the head end of the blood collection needle 1, and the needle handle 1.4 is rotatably connected to the needle handle connecting seat 1.22. When the needle handle 1.4 drives the hollow steel needle 1.1 to move to the maximum position extending from the blood collection needle protective cover 2, the needle handle is rotated 90 degrees to make the needle handle 1.4 abut against the limited position boss 1.5, thereby preventing the blood collection needle from retreating during venous puncture.

[0015] The blood collection needle protective cover 2 of the present invention can be directly fixedly connected to the connecting parts of the connector 3 and the connecting tube 1.3, or the connector 3 and the connecting tube 1.3 can be fixedly connected through a mounting seat (specifically a cylindrical platform with external threads on the outer wall of the cylindrical platform and a through hole in the center), and the blood collection needle protective cover 2 can be connected to the mounting seat by a threaded connection.

[0016] When in use, the needle handle 1.4 drives the connection seat 1.2 and the hollow steel needle 1.1 to extend out of the blood collection needle protective cover 2, rotates the needle handle 1.4 90°, and places the needle handle 1.4 flat on the limiting boss 1.5 to limit the needle handle 1.4, and then collects blood in a conventional manner. After the blood collection is completed, the blood collection tube puncture needle 4 is pulled out of the vacuum blood collection tube, the blood collection needle 1 is pulled out of the vein, and then the needle handle is rotated 90°, and the hollow steel needle 1.1 is retracted into the blood collection needle protective cover 2 through the needle handle 1.4. When the blood collection tube puncture needle 4 is pulled out, the bladder 6 squeezed during blood collection is restored to generate negative pressure. At the same time, the blood collection tube puncture needle 4 is wrapped by the restored rubber protective cover 5, and the blood at the connector 3 and the blood collection needle 1 end flows to the bladder 6 end under the action of suction, so no blood will drip from the blood collection needle 1 end and the blood collection tube puncture needle 4 end.

Claims

1. A disposable venous blood collection needle, comprising a blood collection needle, a blood collection needle protective cover, a connector, a blood collection tube puncture needle, and a rubber protective cover, wherein the rubber protective cover is sleeved outside the blood collection tube puncture needle and the front end of the rubber protective cover is closed to wrap the front end of the blood collection tube puncture needle, characterized in that: A bladder-like object is integrally formed on the rubber protective sleeve and is communicated with the rubber protective sleeve.

2. The disposable venous blood collection needle according to claim 1, characterized in that: The bladder is a spherical bladder or a gourd-shaped bladder surrounding the rubber protective sleeve.

3. The disposable venous blood collection needle according to claim 1 or 2, characterized in that: The capsule is arranged far away from the front end of the puncture head of the blood collection tube.

4. The disposable venous blood collection needle according to claim 3, characterized in that: A first slide groove is formed on the inner wall of one side of the above-mentioned blood collection needle protective cover, and the first slide groove does not penetrate the wall of the blood collection needle protective cover. A second slide groove is formed on the other side of the blood collection needle protective cover, and the second slide groove penetrates the wall of the blood collection needle protective cover, and the first slide groove and the second slide groove are symmetrically arranged; the blood collection needle includes a hollow steel needle, a connecting seat, and a connecting tube; wherein the connecting tube is connected to the connector, and the two ends of the connecting seat are respectively connected to the hollow steel needle and the connecting tube, and the connecting tube is connected to the hollow steel needle, and the connecting tube is a hose or a corrugated tube; a slider embedded in the first slide groove and a needle handle connecting seat passing through the second slide groove are formed on the connecting seat, and the slider is slidably matched with the first slide groove; the needle handle is connected to the needle handle connecting seat.

5. The disposable venous blood collection needle according to claim 4, characterized in that: A limited position boss is formed on the outer wall of the blood collection needle protective sleeve and close to the head end of the blood collection needle, and the needle handle is rotatably connected to the needle handle connecting seat.

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